化学工程2017，Vol.45Issue(1)：60-65,6.DOI:10.3969/j.issn.1005-9954.2017.01.013
热集成变压分离碳酸二甲酯-甲醇的优化与控制
Design and control of dimethyl carbonate and methanol separation via heat-integrated pressure swing distillation
摘要
Abstract
The full heat-integrated pressure swing distillation scheme for separation dimethyl carbonate and methanol system was proposed by means of commercial software Aspen Plus.The optimum design was obtained via taking the minimization of the total annual cost (TAC) as an objective function,compared with the corresponding traditional heat-integrated pressure swing distillation process,with 33.82％ saving in energy consumption and 25.97％ reduction in total annual cost.During the dynamic control system,aiming at the problems of choosing the suitable sensitive plate caused by the uniform temperature distribution of the atmospheric column,a simple and effective scheme was put forward.The influences of the selection of the sensitive stage and dynamic control structure in the atmospheric column on the dynamic responses in the heat-integrated process were further studied on the base of rigorous steady-state simulation.The results show that the composition/temperature cascade control structure (CSC) with stage 29 in the atmospheric column as the control stage can handle the ± 10％ disturbances of feed flow rate and feed composition more effectively.The pressure-compensate temperature control structure (CSD) was adopted to conquer the high pressure fluctuation and the unstable quality of the DMC product in the HPC because of exceeding ± 10％ disturbances of feed flow rate and feed composition.Furthermore,the dynamic controllability was evidently improved;it can maintain the quality of the two products and deal with the ± 20％ disturbances of feed flow rate and feed composition.关键词
碳酸二甲酯/甲醇/TAC/热集成/动态控制Key words
dimethyl carbonate/methanol/TAC/heat-integrated/dynamic control分类
化学化工引用本文复制引用
张青瑞,彭家瑶,张凯..热集成变压分离碳酸二甲酯-甲醇的优化与控制[J].化学工程,2017,45(1):60-65,6.基金项目
山东省自然科学基金项目(ZR2013BM001) （ZR2013BM001）
